:root {
  --ink: #10233b;
  --ink-2: #30445c;
  --muted: #667487;
  --line: #dce2e7;
  --paper: #ffffff;
  --soft: #f4f7f6;
  --blue: #1f63c6;
  --orange: #e95d2a;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.8;
}

a { color: inherit; }

.site-header {
  height: 72px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .96);
}

.header-inner,
.content,
.footer-inner {
  width: min(calc(100% - 48px), 920px);
  margin: 0 auto;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
  font-size: 23px;
  font-weight: 900;
}

.brand-mark {
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
}

.back-link {
  font-size: 14px;
  font-weight: 700;
  text-underline-offset: 5px;
}

.content { padding: 88px 0 112px; }

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(28px, 8.6vw, 60px);
  line-height: 1.2;
  word-break: keep-all;
}

.updated {
  margin: 0 0 56px;
  color: var(--muted);
  font-size: 14px;
}

section {
  padding: 30px 0;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 12px;
  font-size: 24px;
  line-height: 1.45;
}

p,
ul { margin: 0 0 16px; color: var(--ink-2); }

li + li { margin-top: 8px; }

.site-footer {
  padding: 36px 0;
  color: #c4ced8;
  background: #09192c;
  font-size: 13px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.footer-links { display: flex; gap: 18px; }

@media (max-width: 600px) {
  .header-inner,
  .content,
  .footer-inner { width: min(calc(100% - 32px), 920px); }
  .content { padding: 64px 0 80px; }
  .footer-inner { display: grid; }
}